Gerard: Please take a look at this link: http://www.smtinfo.net/startpage.html It has been a great help to us in the past! I also have some additional information regarding BVH and IVH which I will email to you shortly. Best regards, G.C. Vaghasia AccuCircuits, Inc. "Your Off-Shore PCB Specialists" [log in to unmask] www.accucircuits.com -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Flatfield, Cadcam Sent: Tuesday, May 15, 2001 6:37 AM To: [log in to unmask] Subject: [TN] Blind and burried Via's I am looking for a website that gives good design rules about blind and burried via's. Can someone direct me to a side or has anyone some information about this. We are now updating our design rules and want to expand it with some information about BVH. Best regards, Gerard Goossens